@fiberplane/hono-otel/dist/patch/fetch.js

Hono middleware to forward OpenTelemetry traces to a local instance of @fiberplane/studio

import { SpanKind } from "@opentelemetry/api";
import shimmer from "shimmer";
import { measure } from "../measure.js";
import { getRequestAttributes, getResponseAttributes, isWrapped, } from "../utils/index.js";
const { wrap } = shimmer;
export function patchFetch() {
    // Check if the function is already patched
    // If it is, we don't want to patch it again
    if (isWrapped(globalThis.fetch)) {
        return;
    }
    wrap(globalThis, "fetch", (original) => {
        return measure({
            name: "fetch",
            spanKind: SpanKind.CLIENT,
            onStart: (span, [input, init]) => {
                span.setAttributes(getRequestAttributes(input, init));
            },
            onSuccess: async (span, responsePromise) => {
                const response = await responsePromise;
                const attributes = await getResponseAttributes(response);
                span.setAttributes(attributes);
            },
        }, original);
    });
}